2008 Indication Product Workshop Temperature / PID Controls

Temperature/PID Control We do that!

Why is this cool? Most monitored/controlled variable Market $850 million worldwide It is a core business for Red Lion 2007 best sales growth in years

How do we Compete? Offer Temperature and Process Models T16 Low Cost 1/16 DIN Controllers T48 Feature Rich 1/16 DIN Controllers TCU/TSC 1/8 DIN Controllers Built and Supported in the US Best Distribution Network

The Homerun Hitters

Positioning… Not recognized by customers Below the radar of competition Selling since 1991 About 11% of the Indication Sales On/off and PID control Not pretty, but offers some of the best control in the industry

Add all this up … and we are growing!!!

Intro to PID

On / Off Control Thermostat in house Typical Overshoot / Undershoot

Intro to PID On / Off Control Hysteresis slows oscillation Increases oscillation amplitude

Intro to PID What is PID? P = Proportional Band % of entire input span 0 – 100% output power integrated over this band I = Integral Time Time in seconds Adjusts output based on amount of error D = Derivative Time Also expressed in seconds Adjusts output based on rate of change

Intro to PID Proportional Only Control P band is expressed as a % of entire input span Type J thermocouple range is –200 o to 760 o C, or input span of 960 o C If P = 10 (%) 10% of 960 = 96 o

Intro to PID Proportional Only Control cont’d Lower P to 5% Type J thermocouple range is –200 o to 760 o C, or input span of 960 o C If P = 5 (%) 5% of 960 = 48 o C 100 % 48 C

Intro to PID Proportional Only Control cont’d Lower P to 1% Type J thermocouple range is –200 o to 760 o C, or input span of 960 o C If P = 1 (%) 1% of 960 = 9.6 o C 100 % 9.6 C The lower the P band, the higher the gain Back to “On/Off” control

Intro to PID Proportional, Integral Control Integral is time, in seconds, that Integral contribution will equal that of the Proportional contribution (to the output power) In this example, if Prop = 30% OP, Int adds 30% OP over 5 second timeframe 5 Sec Integral Time Looks at amount of error, and adds OP, over Integral timeframe, equivalent to the Prop contribution… Etc…

Intro to PID Proportional, Integral Control Integral contribution works to remove Steady State Error

Intro to PID Proportional, Integral, Derivative Control Derivative is also time, in seconds Derivative Time 10 Sec Etc… Derivative corrects for the rate of change taking place in the process Calculates future process value if rate of change continues for (Derivative Time), and adjusts OP accordingly Looks at rate of change

Intro to PID Proportional, Integral, Derivative Control Final result Final results may vary

PID Control with discrete outputs Time proportioning: Outputs are on for a percentage of the “Cycle Time” Cycle Time (CYCT): On period / Off period CYCT factory setting: 2 seconds Intro to PID

The “tcod” Value 0 = Fastest Response, more overshoot 1 = Medium Response, less overshoot 2 = Slowest Response, minimal overshoot Intro to PID Set before Autotune, the tcod allows you to decide how aggressively you want to reach setpoint

Auto Tuning Sequence Intro to PID

Application

Application Details Control mold oven temperature 1/16 DIN Mounting Main Control Relay Output No Alarm Capability Required Need a setpoint (100° F) Need Sensor, “J” Thermocouple Display Degrees in F Autotune Capability Need RS485 Comms

Product Selection Meter – T Sensor – TMPJ2SU2, “J” Thermocouple

Unit Installation

Wiring Connect TC to terminals 8 & 9 Connect AC power to terminals 11 & 12

Normal Display Mode

Unprotected Parameter Mode

Protected Parameter Mode

Hidden Function Mode

Configuration Parameters Configuration 1, Inputs (1-IN) Configuration 2, Outputs (2-OP) Configuration 3, Lockouts (3-LC) Configuration 4, Alarms (4-AL) Configuration 5, Cooling (5-O2) Configuration 6, Serial Comms. (6-SC) Configuration 7, Remote SP/HC (7-N2) Configuration 8, 2 nd Analog Out (8-A2) Configuration 9, Factory Settings (9-FS)

Connect comms to terminals 13 & 14 GREEN = 13 YELLOW = 14 Wiring

Let’s try Crimson!!

Review Application Details Control mold oven temperature 1/16 DIN Mounting Main Control Relay Output No Alarm Capability Required Need a setpoint (100° F) Need Sensor, “J” Thermocouple Display Degrees in F Autotune Capability Need RS485 Comms

Connect light bulb to terminals 4 & 12 Connect jumper to terminals 5 & 11 Wiring

Invoking Autotune Enter a setpoint Press and hold the “P” key to enter “Hidden” loop If necessary, use “P” key to scroll to “tUNE” Press the “up” arrow key to change from “no” to “yes” Press the “P” key to invoke Autotune

Invoking Autotune

PID Control… …we do that!!!